How to use the react-native-watch-connectivity.getWatchReachability function in react-native-watch-connectivity

setUpWatchConnectivity = () => {
		watch.getWatchReachability((err, watchIsReachable) => {
			this.setState({ watchIsReachable });
		});
		watch.subscribeToWatchReachability((err, watchIsReachable) => {
			if (!err) {
				this.setState({ watchIsReachable });

				if (watchIsReachable) {
					this.sendTokenToWatch();
				}
			}
		});
		watch.getWatchState((err, watchState) => {
			if (!err && watchState === 'Activated') {
				this.sendTokenToWatch();
			}
		});